Yamaha 2012 Grizzly 300 Service Manual page 136

2
1
VALVES AND VALVE SPRINGS
EBS00238
REMOVING THE VALVES AND VALVE
SPRINGS
1. Check:
• valve sealing
1
Leakage at the valve seat
valve face, valve seat and valve seat width.
Refer to "CHECKING THE VALVES AND
VALVE SPRINGS".
2
a. Pour a clean solvent
exhaust ports.
b. Check that the valve seals properly.
There should be no leakage at the valve
seat
2. Remove:
• valve cotters
TIP
Attach a valve spring compressor
attachment
retainer and the cylinder head to remove the
valve cotters.
4-16
ENG
into the intake and
1
.
2
between the valve spring
Valve spring compressor
P/N. YM-04019, 90890-04019
Valve spring compressor attach-
ment
P/N. YM-01253-1, 90890-01243
→ Check the
and